Cal. Pub. Resources Code § 6830.3
In satisfaction of the requirements of subdivisions (a) and (b) of Section 6830.2, the commission may consider, use, apply or adopt any means, methods, formulas or data available to it in order to arrive, in accordance with generally recognized good engineering practice, at any provisions to be included in any agreement amendatory to the lease, mutually acceptable to the holder of the lease, including the rate or rates of royalty to be applied, and otherwise in conformity with the provisions of this section and Section 6830.2.
The royalty rate or rates to be applied during secondary recovery operations shall in no event be less than the minimum royalty provided by the lease prior to any amendment thereof entered into pursuant to this section and Section 6830.2, but nothing in this section and Section 6830.2 is intended to require that the holder of the lease shall account to the State for a guaranteed quantity of royalty production, but neither shall it prohibit the holder of the lease from guaranteeing to the State any given quantity of royalty production.
Amendatory agreements entered into pursuant to and in conformity with this section and Section 6830.2 may be made in conjunction with agreements entered into for the purpose of effecting a co-operative or unit plan of development pursuant to the provisions of this code, including Section 6832 thereof.
Ca. Pub. Res. Code § 6830.3